Thymidine, 3′-acetate 5′-[2-[(4-amino-2-pyridinyl)(phenylmethyl)amino]ethyl carbonate]

Guanosine, 2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-acetate 5′-[2-[(4-amino-2-pyridinyl)methylamino]-1-phenylethyl carbonate]

Adenosine, N-benzoyl-2′-deoxy-, 3′-acetate 5′-[2-[(4-amino-2-pyridinyl)methylamino]-1-phenylethyl carbonate]

Cytidine, N-benzoyl-2′-deoxy-, 3′-acetate 5′-[2-[(4-amino-2-pyridinyl)methylamino]-1-phenylethyl carbonate]

Thymidine, 3′-acetate 5′-[2-[(4-nitro-2-pyridinyl)(phenylmethyl)amino]ethyl carbonate]

Guanosine, 2′-deoxy-N-(2-methyl-1-oxopropyl)-, 3′-acetate 5′-[2-[methyl(4-nitro-2-pyridinyl)amino]-1-phenylethyl carbonate]

Adenosine, N-benzoyl-2′-deoxy-, 3′-acetate 5′-[2-[methyl(4-nitro-2-pyridinyl)amino]-1-phenylethyl carbonate]

Cytidine, N-benzoyl-2′-deoxy-, 3′-acetate 5′-[2-[methyl(4-nitro-2-pyridinyl)amino]-1-phenylethyl carbonate]

Thymidine, 3′-acetate 5′-[2-[methyl(4-nitro-2-pyridinyl)amino]-1-phenylethyl carbonate]

Guanosine, 2′-deoxyguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-

Cytidine, 2′-deoxy-2′,2′-difluoro-, 3′-methanesulfonate

4-Amino-1-[2-deoxy-2,2-difluoro-3-O-(methylsulfonyl)-α-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone

Cytidine, 2′-deoxy-2′,2′-difluoro-5′-O-(triphenylmethyl)-, 3′-methanesulfonate

4-Amino-1-[2-deoxy-2,2-difluoro-3-O-(methylsulfonyl)-5-O-(triphenylmethyl)-α-D-erythro-pentofuranosyl]-2(1H)-pyrimidinone